Articles from Jie Meng

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   (1 articles) Zhejiang University

2. Popular Articles

   Sinusoidal B-M method based spectral domain optical coherence tomography for the elimination of complex-conjugate artifact

   Development of a non-uniform discrete Fourier transform based high speed spectral domain optical coherence tomography system

   Development of a high speed spectral domain optical coherence tomography system at 835 nm

   Transit-time analysis based on delay-encoded beam shape for velocity vector quantification by spectral-domain Doppler optical coherence tomography

   Common path endoscopic optical coherence tomography with outside path length compensation

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1. Transit-time analysis based on delay-encoded beam shape for velocity vector quantification by spectral-domain Doppler optical coherence tomography

   Explore Article opticsinfobase.org (Jan 11 2010) Doppler

   We propose a transit-time based method to ascertain the azimuth angle of a velocity vector by spectral-domain Doppler optical coherence tomography (DOCT), so that three-dimensional (3-D) velocity vector can be quantified. A custom-designed slit plate with predetermined slit orientation is placed into the sample beam to create three delay-encoded sub-beams of different beam shape for sample probing. Based on the transit-time analysis for Doppler bandwidth, the azimuth angle within 90° range is evaluated by exploitation of the complex signals corresponding to three path length delays. 3-D velocity vector is quantified through further estimating of Doppler angle and flow velocity by ... (Read Full Article)
   

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2. Development of a high speed spectral domain optical coherence tomography system at 835 nm

   Explore Article SPIE Digital Library (Dec 1 2009) Developmental Biology , Doppler

   We develop a high speed multi-functional spectral domain (SD-OCT) system, using a broadband light source centered at 835nm and a custom-built spectrometer with a spectral resolution of 0.0674nm. After precise spectral calibration of the spectrometer, non-uniform discrete Fourier transform (NDFT) of the acquired spectral data is adopted for image reconstruction. In vivo imaging of human finger from volunteer at A-scan rate of 29 kHz with different reconstruction methods reveal that with the NDFT method, improved sensitivity fall-off especially at large depth is achieved in contrast to the conventional discrete Fourier transform (DFT) with interpolation method. And the phase information of ... (Read Full Article)
   

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3. Sinusoidal B-M method based spectral domain optical coherence tomography for the elimination of complex-conjugate artifact

   Explore Article opticsinfobase.org (Sep 4 2009)

   A high speed spectral domain optical coherence tomography based on the spatial sinusoidal phase modulation for the elimination of complex-conjugate artifact is presented, where sinusoidal phase modulation of reference arm (M scan) and transverse scanning of sample arm (B scan) are performed simultaneously (sinusoidal B-M method). Herein, the linear phase modulation of the reference arm in conventional linear B-M method is modified to sinusoidal phase modulation. The proposed sinusoidal B-M method relaxes the requirements on the phase-shifting mechanical system and avoids sensitivity fall-off along the transverse direction in contrast to the linear B-M method. A criterion for the relation between ... (Read Full Article)
   

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4. Development of a non-uniform discrete Fourier transform based high speed spectral domain optical coherence tomography system

   Explore Article opticsinfobase.org (Jul 2 2009)

   We develop a high speed spectral domain optical coherence tomography (SD-OCT) system based on a custom-built spectrometer and non-uniform discrete Fourier transform (NDFT) to realize minimized depth dependent sensitivity fall-off. After precise spectral calibration of the spectrometer, NDFT of the acquired spectral data is adopted for image reconstruction. The spectrometer is able to measure a wavelength range of about 138nm with a spectral resolution of 0.0674nm at central wavelength of 835nm, corresponding to an axial imaging range of 2.56mm in air. Zemax simulations and sensitivity fall-off measurements under two alignment states of the spectrometer are given. Both theoretical simulations and ... (Read Full Article)
   

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5. Common path endoscopic optical coherence tomography with outside path length compensation

   Explore Article SPIE Digital Library (Jan 8 2008) Endoscopy

   Yaliang Yang, Zhihua Ding, Jie Meng et al. Endoscopic optical coherence tomography (OCT) allowing high-resolution imaging of internal tissue is attractive for medical imaging. Fibre, fibre bundle or GRIN lens rod acting as endoscopic probe is placed in the sample arm of a Michelson interferometer in current endoscopic OCT systems, this arran ... [Proc. SPIE Int. Soc. Opt. Eng. 6826, 68261S (2008)] published Tue Jan 8, 2008. (Read Full Article)
   

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